Abstract

The metals are regularly used as reflectors of electromagnetic fields emitted by antennas ranging from microwaves up to THz. To enhance the reflection and thus the gain of the antenna, metallic high impedance surfaces (HIS) are used. HIS is a planar array of continuous metallic periodic cell surfaces able to suppress surface waves, which cause multipath interference and backward radiation in a narrow bandwidth near the cell resonance. Also, the image currents are reduced, and therefore the antenna can be placed near the HIS. We demonstrate that graphene is acting as a HIS surface in a very large bandwidth, from microwave to THz, suppressing the radiation leakages better than a metal.

We thank the European Commission for the financial support via the FP 7 NANO RF (Grant Agreement No. 318352).

Article outline:I. INTRODUCTIONII. ENHANCEMENT OF ELECTROMAGNETIC FIELD RADIATION OF A DIPOLE PLACED ABOVE A GRAPHENE REFLECTORIII. ENHANCEMENT OF ELECTROMAGNETIC FIELD RADIATION OF A DIPOLE DEPOSITED OVER A DIELECTRIC LAYER BACKED BY A GRAPHENE MONOLAYERIV. CONCLUSIONS